I expect good things. They are basically outer 1500 cvs on each end, and from what I've seen the inner tripod joint on silverados is usually what breaks, so overall they should be stronger.... especially since I'm going from s10 stuff to full size stuff. I wouldn't low gear crawl with them, but the s10 stuff held up to a 5.3. Secondary advantage for me is I'm awd and the tcase I have is a viscous clutch type that splits up to 33/66. Sp at most I'm putting 33% of my torque through the front drivetrain, as well as it having viscous slip (will give when bound up)Awesome work, I'm going through a 4wd conversion with a custom front half similar to yours right now. Those track motive shafts are a great idea to keep fixed CV joints for the angle yet have some slip. Any idea how well they will hold up?